CN205355280U - Ground net is used in electric experimental training - Google Patents
Ground net is used in electric experimental training Download PDFInfo
- Publication number
- CN205355280U CN205355280U CN201620126944.8U CN201620126944U CN205355280U CN 205355280 U CN205355280 U CN 205355280U CN 201620126944 U CN201620126944 U CN 201620126944U CN 205355280 U CN205355280 U CN 205355280U
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- China
- Prior art keywords
- grounded screen
- test
- net
- electrical test
- horizontal grounding
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- Expired - Fee Related
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- 238000012549 training Methods 0.000 title claims abstract description 38
- 238000012360 testing method Methods 0.000 claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005246 galvanizing Methods 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 239000004020 conductor Substances 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
The utility model discloses a ground net is used in electric experimental training, including two at least horizontal ground nets, establish ties through controlling resistor between two horizontal ground nets or directly establish ties together, horizontal ground net is driven underground through perpendicular earthing pole. Controlling resistor can realize milliohm level resistance and adjust. Hot -galvanize square steel material is chooseed for use to perpendicular earthing pole. At least, be equipped with a test point on every horizontal ground net. The utility model discloses well test point is fixed, can carry out ground connection through two test points and switch on experimental wiring and test, masters test principle and wiring method. Through adjusting controlling resistor, changes the equivalent direct current resistance between two test points, realize the infinitely variable control of resistance between 2, measure the guide rule requirement according to earthing device performance parameters, analog ground net ground connection downlead contact failure, corrode fault data such as split seriously, even, make the student master the ground connection standard of switching on through the analysis data, realization ground connection switches on the dynamic measurement of data.
Description
Technical field
This utility model relates to electrically training test field, particularly relates to a kind of electrical test training grounded screen.
Background technology
In impedance ground practical training project, according to engine request, when measuring the impedance ground of grounded screen, the straight-line method in the middle of three electrode method is generally adopted to measure impedance ground, as it is shown in figure 1, the distance D of wherein electric current pole C and earthing pole GCGRequirement is 4～5 times of grounded screen maximum diagonal D, the distance D of voltage pole P and earthing pole GPGRequirement is the D of 0.5～0.6 timesCG；Being moved twice along connecting line direction between measurement electric current pole and tested grounding device by voltage pole, the distance of movement is about d every timeCG5%, repeat aforesaid operations, the relative error between three test values is less than 5%.
In practice-training teaching we measure to as if the grounded screen in real training hall, this grounded screen size is approximately 30 meters long, and 20 meters are wide, therefore catercorner length about 36 meters.According to measurement requirement, the position of electric current pole is accomplished by being within the scope of range measurement earth point 144～180 meters, so causing problems with occur: on the one hand, owing to bracing wire is apart from long, practical operation is got up consuming time more, light arranges line have to half an hour, just in case soil contact in voltage level position is improper, reselects voltage level, then measure general minimum test three times, consuming time longer, real training efficiency is low.And it is subject to the restriction in place, impact test teaching result；On the other hand, owing to distance is longer, electric current pole, voltage pole position, special messenger must be arranged during test to guard, even if so, just in case operator and guardian sing not in place mutually, it is possible to get an electric shock, there is potential safety hazard.
In earth-continuity practical training project, first find out that be connected good down conductor with grounded screen as a reference point, consider that electric substation place is likely to relatively larger, p-wire can not be oversize, multipoint earthing equipment downlead should be selected as benchmark, the down conductor of each electrical equipment selects a bit turn on measured point as this equipment.Utilize continuity test instrument 1 wiring shown in Fig. 2, measure the D.C. resistance between measured point 3 and reference point 2.
According to " DL/T475-2006 grounding device characterisitic parameter measures directive/guide ", test data demand is specific as follows:
Equipment test value in order is at below 50m Ω；
Measurement result is between 50m Ω～200m Ω, and result still can accept, and visual plant should arrange repetition measurement and inspection to process.
Measurement result is between the Ω of 200m Ω～1, and equipment ground is not good, and should ascertain the reason process as early as possible.
Measurement result is at 1 more than Ω, and equipment is positioned at main earth mat and is connected, and should ascertain the reason process as early as possible.The test value of independent lightning rod should at more than 500m Ω.
Earth-continuity practical training project is primarily present the problem in following two in real training:
Test object is mainly the down conductor of each position equipment of real training hall, restricted to time on the one hand, because the several station of Practice Curriculum is all carry out simultaneously, can only shift to an earlier date and after station trainer communication, first suspend test equipment real training, just can test.On the other hand, being also affected by the impact in space, some distance relative between each station, test connection is also required for certain length, could meet test request.
Test data are fixed.Due to the down conductor in the grounded screen of real training hall, the data tested out are not changed in substantially, and the data that one test point of such student is measured are just as, it is impossible to standard has deeper of understanding, and result of training is general.
Utility model content
The purpose of this utility model is contemplated to solve the problems referred to above, provide a kind of electrical test training grounded screen, shorten test connection, improve real training efficiency and real training safety coefficient, by regulating the knob of adjustable resistance control chamber, change the equivalent d.c. resistance between two test points, it is possible to the fault data such as analogue ground net down conductor loose contact, seriously corroded, even fracture, it is achieved the kinetic measurement of earth-continuity data.
To achieve these goals, this utility model adopts the following technical scheme that
A kind of electrical test training grounded screen, including at least two horizontal grounding net, is connected by adjustable resistance between two horizontal grounding nets or is directly cascaded；Horizontal grounding net is driven underground by vertical grounding electrode.
Described adjustable resistance can realize Milliohm resistance and regulate.
Described vertical grounding electrode selects galvanizing square steel material.
The thickness of described vertical grounding electrode is 1mm～5mm.
The horizontal grounding pole of described horizontal grounding net adopts Hot-dip zinc-coated flat steel sheet to be welded.
The thickness of described horizontal grounding pole is 2mm～6mm.
Each described horizontal grounding is on the net at least provided with a test point.
Described test point is connected to copper sheet, and one end of copper sheet is exposed on the ground, and the other end is connected with horizontal grounding net.
The length of side of the integral level grounded screen of multiple horizontal grounding nets composition is sized to 1m～5m.
It is in series with switch between two horizontal grounding poles.The one or more horizontal grounding nets arbitrarily wanting to utilize by controlling switch to select, when indivedual grounded screens go wrong, are beneficial to replacing.
The beneficial effects of the utility model are:
In this utility model, test point is fixed, it is possible to carry out earth-continuity test connection and test by two test points, grasps test philosophy and mode of connection.
By regulating adjustable resistance, change the equivalent d.c. resistance between two test points, realize the step-less adjustment of resistance between 2, according to " DL/T475-2006 grounding device characterisitic parameter measures directive/guide " requirement, the fault data such as analogue ground net down conductor loose contact, seriously corroded, even fracture, student is made to grasp earth resistor standard by analytical data, it is achieved the kinetic measurement of earth-continuity data.
Owing to actual grounded screen size is relatively larger, according to impedance ground test requirements document, test connection is very long, process of the test is more complicated, and real training efficiency comparison is low, and a kind of method being primarily intended to church's student's earth loop impedance test of our training, by this grounded screen model, the study of earth loop impedance test method can be completed, and improve real training efficiency, reduce real training security risk.
By regulating adjustable resistance, making adjustable resistance is 0, and underground grounded screen is equivalent to the horizontal grounding net of 2m*2m, is applied to earth loop impedance test real training.So, according to method of testing requirement, the diagonal of analogue ground net about about 2.8m, during wiring, electric current pole span is about 11～14m from this grounded screen, shortens test connection, improves real training efficiency and real training safety coefficient.
Accompanying drawing explanation
Fig. 1 is straight line three electrode method test Grounding impedance principle wiring diagram；
Fig. 2 is earth-continuity test wiring diagram；
Fig. 3 is the structural representation of the present embodiment；
Wherein, 1. continuity test instrument, 2. reference point, 3. measured point, 4. adjustable resistance, 5. test point.
Detailed description of the invention:
Below in conjunction with accompanying drawing and embodiment, this utility model is described further:
As it is shown on figure 3, a kind of electrical test training grounded screen, including at least two horizontal grounding net, the present embodiment includes two horizontal grounding nets, is cascaded by adjustable resistance 4 between two horizontal grounding nets；Horizontal grounding net is driven underground by vertical grounding electrode.Integral level grounded screen be sized to 2m*2m.
Described adjustable resistance can realize Milliohm resistance and regulate.
Described vertical grounding electrode selects the material galvanizing square steel material of 40mm*40mm*3mm.
The horizontal grounding pole of described horizontal grounding net adopts the Hot-dip zinc-coated flat steel sheet of 50mm*5mm to be welded.
Each described horizontal grounding is provided with a test point 5 on the net.Described test point 5 is connected to copper sheet, and one end of copper sheet is exposed on the ground, and the other end is connected with horizontal grounding net.
Detailed description of the invention of the present utility model is described in conjunction with accompanying drawing although above-mentioned; but the not restriction to this utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art need not pay various amendments or deformation that creative work can make still within protection domain of the present utility model.
Claims (10)
1. an electrical test training grounded screen, is characterized in that, including at least two horizontal grounding net, is connected by adjustable resistance or be directly cascaded between two horizontal grounding nets；Horizontal grounding net is driven underground by vertical grounding electrode.
2. a kind of electrical test training grounded screen as claimed in claim 1, is characterized in that, described adjustable resistance can realize Milliohm resistance and regulate.
3. a kind of electrical test training grounded screen as claimed in claim 1, is characterized in that, described vertical grounding electrode selects galvanizing square steel material.
4. a kind of electrical test training grounded screen as described in claim 1 or 3, is characterized in that, the thickness of described vertical grounding electrode is 1mm～5mm.
5. a kind of electrical test training grounded screen as claimed in claim 1, is characterized in that, the horizontal grounding pole of described horizontal grounding net adopts Hot-dip zinc-coated flat steel sheet to be welded.
6. a kind of electrical test training grounded screen as claimed in claim 5, is characterized in that, the thickness of described horizontal grounding pole is 2mm～6mm.
7. a kind of electrical test training grounded screen as claimed in claim 1, is characterized in that, each described horizontal grounding is on the net at least provided with a test point.
8. a kind of electrical test training grounded screen as claimed in claim 7, is characterized in that, described test point is connected to copper sheet, and one end of copper sheet is exposed on the ground, and the other end is connected with horizontal grounding net.
9. a kind of electrical test training grounded screen as claimed in claim 1, is characterized in that, the length of side of the integral level grounded screen of multiple horizontal grounding nets composition is sized to 1m～5m.
10. a kind of electrical test training grounded screen as claimed in claim 1, is characterized in that, be in series with switch between two horizontal grounding poles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620126944.8U CN205355280U (en) | 2016-02-18 | 2016-02-18 | Ground net is used in electric experimental training |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620126944.8U CN205355280U (en) | 2016-02-18 | 2016-02-18 | Ground net is used in electric experimental training |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205355280U true CN205355280U (en) | 2016-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620126944.8U Expired - Fee Related CN205355280U (en) | 2016-02-18 | 2016-02-18 | Ground net is used in electric experimental training |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205355280U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707066A (en) * | 2017-01-20 | 2017-05-24 | 国网河南省电力公司电力科学研究院 | Standard real-model earthing test device |
| CN112782615A (en) * | 2020-04-30 | 2021-05-11 | 天津市中力防雷技术有限公司 | Test data processing and analyzing method for electrical integrity of traction substation grounding device |
-
2016
- 2016-02-18 CN CN201620126944.8U patent/CN205355280U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707066A (en) * | 2017-01-20 | 2017-05-24 | 国网河南省电力公司电力科学研究院 | Standard real-model earthing test device |
| CN106707066B (en) * | 2017-01-20 | 2023-03-17 | 国网河南省电力公司电力科学研究院 | Standard true type grounding test device |
| CN112782615A (en) * | 2020-04-30 | 2021-05-11 | 天津市中力防雷技术有限公司 | Test data processing and analyzing method for electrical integrity of traction substation grounding device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160629 Termination date: 20170218 |